<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>天气案例</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>今天天气很{{info}}</h2>
        <!-- <button @click="isHot=!isHot">切换天气</button> -->
        <!--click绑定的事件中可以写一些简单的代码，有第二个语句不合适这样子书写-->
        <button @click="changeWeather">切换天气</button>
    </div>
</body>

<script>
    new Vue({
        el:'#root',
        data:{
          isHot:true,
        },
        computed:{
            info(){
                return this.isHot?'炎热':'凉爽'
            }
        },
        methods:{
            changeWeather(){
                this.isHot=!this.isHot
            } 
        }
    })
</script>

</html>